scala.meta tutorial

Target audience

• ✅ Tool authors
  • Want to gather information about code?
  • Want to generate programs from scratch?
  • ...or by modifying existing ones?
  • Then scala.meta is what you need!
• ❌ Macro writers
  • No macro support for 0.1
  • However, both def macros and macro annotations
    are tentatively planned for 1.0

👍 Trees that work

• No desugarings
• Precise range positions
• Immutable semantic attributes
• Check out State of the Meta, Summer 2015 for architectural details
• Or read on to observe this in practice

Potential risks

• This is pre-release software
• Layout inference needs work (#164)
• Semantic infrastructure is far from completion (#148)
• Performance could use some improvements (#149 and #152)
• All that and then some more is planned to be addressed in 0.1

Practical guides

• Rewriting deprecated view bounds (/tree/view-bounds)
• Exploring semantics (/tree/exploring-semantics)